Michael,
If I understand Vines, he is proposing something a little different.
All the best,
BG
Generator support
- Thread starter fresnoboy
- Start date
If I understand Vines, he is proposing something a little different.
All the best,
BG
Vines
Active Member
My description mirrors what I understand Tesla to want. The Generator ATS can be anywhere downstream of the Gateway.
Your drawing is the same, just with an ATS, instead of the MTS Tesla is showing.
Your drawing is the same, just with an ATS, instead of the MTS Tesla is showing.
One of the problems with this approach is that you have to have the gateway managing the grid disconnect. The gateay only supports 200A max feeds, and if you have more than that (we have 400A single phase feed), things get very complicated, esp when the whole house is being backed up.
Part of the issue is how the NEC requires you to count load in a modern home. It's a big house, but we have Mitsubishi VRF style HVAC units that start at 5A and spool up to 35A as load requires, and all the lighting is all LED. We do have an EV, but it only charges after midnight, so we never ever get close to a 400A load. I doubt we'd ever see a real 200A load even when we were maxing out use. We have a 30KW generator and it handles the house easily with room to spare (we don't have the pool equipment on it however)
I can't get tesla to even consider allowing the use of powerwalls in this configuration because of the >200A panel. If they wern't so NIH and allowed the use of a 3rd party ATS, this would be easy to accommodate. Generators have to deal with all of the same sorts of issues and you can find scores of them at different power levels.
Part of the issue is how the NEC requires you to count load in a modern home. It's a big house, but we have Mitsubishi VRF style HVAC units that start at 5A and spool up to 35A as load requires, and all the lighting is all LED. We do have an EV, but it only charges after midnight, so we never ever get close to a 400A load. I doubt we'd ever see a real 200A load even when we were maxing out use. We have a 30KW generator and it handles the house easily with room to spare (we don't have the pool equipment on it however)
I can't get tesla to even consider allowing the use of powerwalls in this configuration because of the >200A panel. If they wern't so NIH and allowed the use of a 3rd party ATS, this would be easy to accommodate. Generators have to deal with all of the same sorts of issues and you can find scores of them at different power levels.
Okay, what is the status of this?
I currently have a 400 amp service. It goes to a subpanel with a 200 amp and 125 amp breaker. (I had to replace the 200 with the 120 for my solar)
I currently have a 14.5kw solar setup which feeds into a subpanel. I also have a 22Kw generator which feeds into this same subpanel. I have 2 auto transfer switches, one for each subpanel.
All the above works great.
I am now looking at adding some powerwall 2's, maybe 5. From what I gather, a gateway 2 cannot pass 400 amps, so it cannot be connected between the meter and the main panel. So seems next option is to put 2 gateway 2's in, one after each 200 and 125 amp breakers. This feeds my 2 200 amp panels, and if either were to try and draw over 200 amps, the breaker in the main panel blows so no damage to the gateway 2.
I guess I could then hook up batteries to either one of both gateways? Meaning, if the power drops, the gateways would switch off the line. So now everything is electrically connected for use? Solar can power the house or batteries? Batteries can either power the house or being charged or both?
I currently have a 400 amp service. It goes to a subpanel with a 200 amp and 125 amp breaker. (I had to replace the 200 with the 120 for my solar)
I currently have a 14.5kw solar setup which feeds into a subpanel. I also have a 22Kw generator which feeds into this same subpanel. I have 2 auto transfer switches, one for each subpanel.
All the above works great.
I am now looking at adding some powerwall 2's, maybe 5. From what I gather, a gateway 2 cannot pass 400 amps, so it cannot be connected between the meter and the main panel. So seems next option is to put 2 gateway 2's in, one after each 200 and 125 amp breakers. This feeds my 2 200 amp panels, and if either were to try and draw over 200 amps, the breaker in the main panel blows so no damage to the gateway 2.
I guess I could then hook up batteries to either one of both gateways? Meaning, if the power drops, the gateways would switch off the line. So now everything is electrically connected for use? Solar can power the house or batteries? Batteries can either power the house or being charged or both?
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